title: Bioavailability of iron measurement in two nutrients multiple solutions by in vitro and in vivo;a comparative methodology between methods.
abstract: OBJECTIVE
  The bioavailability of dietary iron present in a nutritional formulation may be evaluated by in vitro and in vivo methods since they provide for a cohesive line study and provided in the literature. The aim of this study was to evaluate the bioavailability of iron targeting a comparative analysis of two nutritional supplement formulations (A and B).
  
  
  METHODS
  For this study were using in vitro and in vivo methods, both described in the literature for availability of iron in an enteral feeding after ingestion supplement nutrition with much nutrients.
  
  
  RESULTS
  The results obtained by in vitro simulation of the human gastrointestinal tract were 0.70 ± 0.02 and 0.80 ± 0.01 % iron availability by formulations A and B. In vivo studies, as measured by the curves of serum iron in humans after ingestion of formulations allowed the calculation of coefficient of variation Δ < 0, indicating that there was a low absorption of iron. The bioavailability of iron as two multi-nutrients solutions obtained by in vitro and in vivo showed that there were comparisons of those methodologies used in this study.
authors.affiliation: Department of Internal Medicine, Faculty of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
authors.forename: Luciana
authors.initials: L
authors.lastname: Bueno
authors.forename: Juliana C
authors.initials: JC
authors.lastname: Pizzo
authors.forename: Osvaldo
authors.initials: O
authors.lastname: Freitas
authors.forename: Fernando
authors.initials: F
authors.lastname: Barbosa Júnior
authors.forename: José Ernesto
authors.initials: JE
authors.lastname: dos Santos
authors.forename: Julio Sergio
authors.initials: JS
authors.lastname: Marchini
authors.forename: José Eduardo
authors.initials: JE
authors.lastname: Dutra-de-Oliveira
mesh_terms: D001682:Biological Availability; D003956:Dialysis; D019587:Dietary Supplements; D004750:Enteral Nutrition; D005526:Food, Formulated / Q000032:analysis*; D006801:Humans; D007408:Intestinal Absorption; D019266:Iron, Dietary / Q000097:blood / Q000493:pharmacokinetics*; D009765:Obesity / Q000378:metabolism; D012996:Solutions
chemical_list: D019266:Iron, Dietary; D012996:Solutions